1990’s Chevy TBI 350 identification please

1lukeduke

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Dec 5, 2021
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1977 FJ40
Thank you all for letting me join this forum! I hope this finds you well. I have an engine that I would like to find it’s origin. The casting number is:
#10054727
I see that it’s a 1986 and up 350.
This is where I can’t find any information for 1990’s motors, engine id codes. They end around 1980 for my id TLB. I have pulled the numbers from under my alternator, right side. The id numbers are:
K0123TLB
and
CN 7 125221
The 7 looks different than the rest, so maybe a scratch.
I figured the K is Ontario Canada and January 23rd for the date, but what does TLB mean for a 1990’s TBI motor mean. Also don’t understand the partial vin number. Thanks again for your time!
Lucas
 

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